Alright, let's work through 3155 times 3151 step by step
3155 × 3151 = 3151 × (3155)
+ 3151 × 5 which equals 15755
+ 3151 × 50 which equals 157550
+ 3151 × 100 what gives us 315100
+ 3151 × 3000 that equals 9453000

= 9941405
